welll I confess, I'm using school computers, for Proteus ( I'm not rich )

I'll try it by real 4550 but, a little question, when I tried your USBDemo (mister_e), I realized that after resetting the pic, still the same leds are high ( some kind of save I think) but in your codes, there is no "write" command and I tried it with usb wizard just like my example, it works fine but when I reset the pic all leds are off. why yours are still on ?